TIMOTHY CHOI DO
NPI 1225693948
Emergency Medicine in Round Rock, TX

Q: What is Timothy Choi's NPI number?

The NPI number for Timothy Choi is 1225693948. It was assigned to this individual provider in the NPPES registry on May 8, 2019. The provider is also known as Ji Hwan Choi.

Q: What is Timothy Choi's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Choi was last updated on January 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 08, 2019PECOS EnrolledAccepts Medicare Assignment

300 UNIVERSITY BLVD, ROUND ROCK, TX 78665(512) 509-0100 Get Directions Write a Review

NPPES record last updated: January 20, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jan 20, 2026, May 3, 2023, Jun 8, 2022 and 1 more (4 updates tracked since 2019).

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About Timothy Choi Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TIMOTHY CHOI DO (NPI 1225693948) is an individual emergency medicine provider in Round Rock, Texas, licensed in Texas (T9662) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, is affiliated with St David's Medical Center, and maintains a secondary practice location in Austin.

NPPES Registry Identity

NPI1225693948

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameTIMOTHY CHOICredential: DO

Location Address300 UNIVERSITY BLVDRound Rock, TX 78665-1032

Mailing AddressPo Box 844658Dallas, TX 75284-4658 · (800) 994-0371 · Fax (254) 215-9722

Phone(512) 509-0100

Sole ProprietorNo

Medical School CMSMichigan State University College Of Osteopathic MedicineGraduated 2019

Enumeration DateMay 8, 2019

Last NPPES UpdateJanuary 20, 20264 updates tracked since enumeration

NPPES CertifiedJanuary 20, 2026

✔ NPI 1225693948 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

Licenses✔ Licensed in TX · T9662✔ Licensed in MI · 5101025825

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

300 UNIVERSITY BLVD, Round Rock, TX 78665

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Other Names 1

Former Name (1)Ji Hwan Choi

Secondary Practice Location 1

Location 112221 N Mopac ExpyAustin, TX 78758-2401 · Phone (512) 901-1000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Antidote Health of TX, Blue Cross and Blue Shield of Texas, Oscar Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy Choi Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8325431851

PECOS Enrollment IDI20220920001242

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Timothy Choi reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Scott & White Hospital - Taylor

16 mi

Emergency Medicine

305 MALLARD LN
Taylor, TX 76574

Reassigned Medicare billing, Texas enrollment
84 clinicians in this Medicare group

NPI 1659366557 (512) 352-7611

Longhorn Emergency Medical Associates PA

19 mi

Emergency Medicine

919 E 32ND ST
Austin, TX 78705

Reassigned Medicare billing, Texas enrollment
547 clinicians in this Medicare group

NPI 1649669672 (925) 251-6901

Century Integrated Partners, Inc

162 mi

Emergency Medicine

3500 GASTON AVE
Dallas, TX 75246

Reassigned Medicare billing, Texas enrollment
1,044 clinicians in this Medicare group

NPI 1447615711 (214) 820-2505

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

274 services268 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

197 services176 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

109 services106 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

56 services56 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

43 services43 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

14 services14 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St David's Medical Center

Acute Care Hospitals · Austin, TX

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450431

Location919 E 32nd StAustin, TX 78705 · Travis County

Emergency services Birthing friendly

North Austin Medical Center

Acute Care Hospitals · Austin, TX

4/5 CMS rating

OwnershipProprietary

CMS Certification Number450809

Location12221 Mopac Expressway NorthAustin, TX 78758 · Travis County

Emergency services Birthing friendly

Baylor Scott & White Medical Center - Round Rock

Acute Care Hospitals · Round Rock, TX

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number670034

Location300 University BlvdRound Rock, TX 78664 · Williamson County

Emergency services Birthing friendly

Baylor Scott & White Medical Center Pflugerville

Acute Care Hospitals · Pflugerville, TX

OwnershipVoluntary non-profit - Private

CMS Certification Number670128

Location2600 East Pflugerville ParkwayPflugerville, TX 78660 · Travis County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78665 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$84.92 typical visit price

range $54.84 – $166.88

Typical copayment $21.23 (range $13.71 – $41.72)

Most-billed visit code 99203

Established Patient

$97.05 typical visit price

range $17.52 – $136.11

Typical copayment $24.26 (range $4.38 – $34.02)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BRENNEN J. BEATTY MD

Emergency Medicine